Core making templates



. March 18, 1958 w. BEY 2,826,792

CORE MAKING TEMPLATES Filed Sept. 28, 1955 2 Sheets-Sheet 2 William Bey IN V EN TOR.

United States Patent CORE MAKING TEMPLATES William Bey, Cleveland, Ohio Application September 28, 1955, Serial No. 537,162

2 Claims. (Cl. 22-13) This invention relates in general tonew and useful improvements in foundry equipment, and more specifically to an improved core-making template;

It is the universal practice of foundaries to make core boxes for forming the cores. These core boxes are so shaped whereby, when filled with sand and struck off, they will form one-half of the desired core. Two halves of such core are made and then placed together to form the necessary core. Not only is the forming of these particular 'core boxes expensive, in large foundries where numerous types of cores 'are necessary, it is necessary that there be retained on hand a relatively large'inventory of such core boxes. This is particularly truebecause cores vary in length, size of cross-section and configuration ofwcross-section. 7

It is therefore the primary object of this invention to provide an improved core-making template which is so constructed whereby cores of various sizes, lengths and configurations may be formed with a single coremaking assembly utilizing a plurality of flat templates which may be readily stored for tfuture use.

Another object of this invention is to provide a time making assembly which is in the form of a built up core box, the parts thereof being removable with respect to each other so as to vary the effective siZe of the core.

Still another object of this invention is to provide an improved core-making assembly which includes a base plate and end templates which form the outline for the core to be made, the end templates being replaceable so as to v'arythe cross-section and size of thecore, the end templates being also movable away from and towards each other whereby the length of the core may be varied as desired. I

A further object ofthis invention is to provide an improved coremaking' assembly which includes a basic support and bas'e'plat'e for making cores, the basic support being adjustable for adjustably supporting interchangeable templates whereb cores of the desiredsizes may be made with a single machine utilizing various types of templates. i .7

These,. .toge t her with other objects and advantages which will become subsequently apparent, reside in the details of construction and ope-ration as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a top plan view of the core-making assembly which is the subject of this invention and shows the general relationship of the various components thereof; the general outline of the core to be formed being shown in broken lines;

Figure 2 is a longitudinal vertical sectional view on an enlarged scale taken substantially upon the plane indicated by the section line 22 of Figure 1 and shows the specific details of the core-making machine, the outline of the core to be made being shown by broken lines;

Figure 3 is an enlarged transverse vertical sectional Patented Mar. 18, 19 58 view taken substantially upon the plane indicated by the section line 3-3 of Figure 2 and shows the relationship of the base plate with respect to a support, there also being illustrated the details of a guide in relationship of one of the templates with respect thereto;

Figure 4 is an enlarged fragmentary transverse vertical sectional view taken substantially on the plane indicated by section line 4-4 of Figure 2 and shows the details of the clamp for adjustably retaining the templates in a desired spaced relation; A

Figure 5 is a perspective view of a core half on a reduced scale, the remainder of the core being shown in broken lines; 7

Figure 6 is a perspective view on a reduced scale of a truncated conical co're made with the same core making machine replacing one of the templates utiliZed in making the core of Figure 5; I

Figure 7 is a perspective view on a reduced scale of still another form of core which may be made with the core-making machine; I I

Figure 8 is a perspective view of a template for inak= ing the small end of the core of Figure 6; I

Figure 9 is a template for making the large end of the core of Figure 6 and the ends of the core of Figure 5; and t Figure 10 is a perspective view of the template for forming the opposite ends of the core of Figure 7.

Referring now to the drawings in detail, it will be seen that there is best illustrated in Figures 1 and -2 the coremaking assembly which is the subject of this invention, the core-making assembly being referred to in general by the reference numeral 11). The assembly 10 includes a support which is in the form of a large rectangular plate, the support plate being referred to by the reference numeral 12. The support plate 12 may be su ported on any desired lfoundation or work bench.

Carried by the central portion of the support plate 12 is a thinner, generally rectangular base plate 1 4, the base plate 14 forming the bottom for a core r be formed.

Secured to opposite ends of the support plate 12 in alignment with each other are'cla'inp blocks16. The clamp blocks 16 are spaced above the support plates 12 by means of spacing strips 18 and secured thereto by suitable fasteners 20. As is best illustrated in Figure 4, each clamp block 16 includes a fixed lower half 22 and a removable upper half 24. Formed in the halves 22 and 24 are aligned recesses 26 and28, respectively, for the reception "of support rods 30. In order that the support rods 30may be clamped in adjustable positions, the halves 22 and 24 are clamped together by a clamp bolt32. W -Referring once again to Figure 2 in particular, it will be seen that carried by the opposed ends of'the support rods30 are end plates 34. The. end plates -34;a're generally semi-circular in outline and are provided with two rearwardly extending bosses 36. The support rods 1 30 pass through bores 38 in the bosses 36 and are suitably clamped relative thereto. It will be noted that the support rods 30 extend forwardly of the end plates 34 a slight distance. 7

Removably carried by each of the end plates 34 is a template 40, the template 40 being identical and of semicircular configuration. Each template 40, as best illustrated in Figure 9, is provided with a pair of bores 42 for receiving the ends of the support rods 30. Further, each template 40 is provided with a centrally located set screw hole 44 for facilitating the securing of the templates 40 to the end plates 34.

In order that the desired length of core may be formed, the base plate 14 is provided with a scale 46. Thus, by utilizing the scale 46, the templates 40 may be spaced the desired distance.

After the core-making assembly 10 has been assembled in the manner illustrated in Figures 1 and 2, the desired sand for making the core is packed between the templates 40 in overlying relation with respect to the base plate. 14. The excess sand is then struck oii with a striker bar (not shown) so as to have the desired configuration. Once the core has been formed, the templates 4% may be moved apart and the base plate 14 removed with the core thereon to permit the core to set.

Referring now to Figure in particular, it will be seen that there is illustrated a core half 48. This core half 48 is made utilizing the template 40. A similar core half 48 will then be formed and the two core halves 48 will be joined together to form a single core. It is pointed 'out at. this time that the core halves 48 are provided with central core holes 50. The core holes 50 are formed by an elongated semi-circular crosssectional bar 52 which overlies the base plate 14 and is supported by the spacing strips 18. It is to be noted that the lower half 22 of the clamp block 16 is pro vided with a suitable opening 54 for receiving the end portions of the bar 52. A similar recess 56 is formed in the template 40 and other similar recesses (not shown) are formed in the end plates 34. The purpose of the core holes 50 is to permit the metal to be poured into the mold through the core 48., If desired, suitable vent openings may be formed through the core half 48 intersecting the core holes 50. These vent openings are formed in the core while it is being made by pushing Wires through the sand and striking the bar 52.

It is noted that the bar 52, by extending the full length of the core-making assembly .10, also will function as a guide. The bar 52 will cause perfect alignment of the template 40.

Refering now to Figure 6 in particular, it will be seen that there is illustrated a core which is referred to in general by the reference numeral 58. The core 58 is of a truncated conical outlined and includes halves 60. The core 58 includes a core hole 62. In order to form the core 58, secured to one of the end plates 34 is one of the templates 40. A template 64 is carried by the other of the end plates 34, the template 64 being best illustrated in Figure 8. The template, like the template 40, is semi-circular in configuration, but is of a reduced size. The template 64 is provided with suitable apertures 66 and 68, which correspond to the apertures 42 and 44. An opening 70 is formed in the template 64, the opening 70 corresponding to the opening 56.

Referring now to Figure 10, it will be seen that there is illustrated a modified form of template which is referred .to in general by the reference numeral 72. The template 72 has the outline of one-half of a hexagon and is intended to be utilized in forming a hexagonal core, such as the core 74 illustrated in Figure 7. The template 72 is provided with suitable bores 76 and 78 which correspond to the bores 42 and 44, respectively. Also included is an opening 80 which corresponds to the opening 56.

Although there have been illustrated only three templates, it is to be understood that the number of termpltaes may be varied as desired, the templates varying in configuration and size. By utilizing various combinations of templates, any desired cross-sectional cores may be formed. It is to be understood that by varying the distance between the two end templates the length of the cores may be varied as desired. If, for any reason, the more holes in the cores are not required, the bar 52 may be removed. In such event, templates not hav ing the openings, such as openings 56, 7t), and 72, will be utilized, or suitable means may be used to plug these openings.

From the foregoing description of the present invention, it will be seen that special types of cores may be easily constructed at a minimum cost and that the parts for forming these various special cores may be easily stored in a minimum space. While the present invention is best suited to short-run production, it is of such a nature whereby it may be utilized in long-run production, although it is not recommended.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

1. A core making assembly comprising a support including a base plate, end plates adjustably carried by said support, replaceable templates carried by said end plates in opposed relation and cooperating with said base plate to form a form for a core, a guide overlying said base plateand engaging said end plates to retain said templates in alignment, said support including a pair of clamp blocks, support rods on said end plates adjustably retained by said clamp blocks to position said end plates and said templates.

2. A core making assembly comprising a support including a base plate, end plates adjustably carried by said support, replaceable templates carried by said end plates in opposed relation and cooperating with said base plate to form a form for a core, said support including a pair of clamp blocks, support rods on said end plates adjustably retained by said clamp blocks to position said end plates and said templates, said support rods extending through said end plate and being received in said templates to align said templates.

References Cited in the file of this patent UNITED STATES PATENTS 1,079,988 Kurze Dec. 2, 1913 1,939,885 Farmer Dec. 19, 1933 FOREIGN PATENTS 191,476 Germany Nov. 9, 1907 

